Hi folks,
I'm interested to hear how people have implemented failover in environments where the client IP ranges differ between the two controllers.
For example:
We have two buildings - Building 1 and Building 2. There is no layer 2 link between the buildings and all traffic is routed.
Building 1's wireless client VLAN is 192.168.1.0/24
Building 2's wireless client VLAN is 192.168.2.0/24
Client A is connected to the wireless in Building 1 with IP address 192.168.1.12 when all APs fail over to their backup controller. Now client A is sitting in Building 2's client VLAN with an invalid IP address.
The obvious solution I can think of is to configure named VLANs and source NAT the foreign client VLAN on each controller. However my customer is not too happy about using NAT.
Have any of you good people come up with inventive solutions to this problem?